| [[File:Pipe1.png|thumb|right|200px|PVC-pipe]]
| [[File:Pipe2.png|thumb|leftright|200px|ABS-pipe]]
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| [[File:Cleanout1.png|right|200px]]
| [[File:Cleanout2.png|leftright|200px]]
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| [[File:Sweep1.png|thumb|right|200px|correct]]
| [[File:Sweep2.png|thumb|leftright|200px|incorrect]]
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Always use bedding materials to help protect the sewer pipe from damage due to sharp objects. The bedding material is laid down and raked to the desired slope, making it easier to install the pipe and providing long-term insurance against settling and breakage.
| [[File:Bedding1Bedding2.png|thumb|right|200px150px]]| [[File:Bedding2Bedding1.png|thumb|leftright|200px]]
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=== Vents ===
In the typical building sewer layout shown to the left--notice that the sewer line is connected to a vent stack that protrudes from the roof. This provides positive ventilation that transports sewer gasses to the roof level, instead of the street level where they may cause odors or nuisances.
| [[File:Vents1.png|thumb|right|200px]]
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[[File:Vents1.png|right|200px]]
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''[[Practitioner's Tool / Technology and Operation / Sewers Comparison|Back to Sewers Comparison]]''
''[[Practitioner's Tool / Technology and OperationSewers Comparison|Back to Technology and OperationSewers Comparison]]''<br/>
